Washing Machine Smells Bad - How to Clean It and Keep It Running in Addlestone

Published September 2026 | Washing machine smells bad how to clean it

How Long Should a Washing Machine Last and What Affects That

Ten to fourteen years is the realistic lifespan for most washing machines sold in the UK, based on average household use of five to six cycles a week. Push that to daily use for a large family, and components wear faster. Keep on top of basic maintenance, and there's no reason a quality machine shouldn't reach fifteen years or beyond.

What actually shortens the life of a washing machine is rarely the washing itself - it's the neglect that builds up quietly in the background. The drum seal collects moisture and mould. The pump filter fills with fluff, hair grips, and grit. Detergent residue congeals in the drawer housing. None of these feel urgent until the machine starts smelling, draining slowly, or vibrating badly during spin.

Addlestone sits in a moderately hard water area, which makes this worse than in many other parts of the country. Hard water accelerates limescale build-up on the heating element, inside the drum walls, and around the pump. That limescale creates rough surfaces where bacteria and mould anchor themselves far more effectively than in a scale-free machine - which is why some homeowners here find their machine smells even after cleaning. The limescale is trapping the residue the cleaning cycle didn't fully flush away.

The smell your washing machine develops is not a cosmetic problem. It is a sign that bacteria, mould, and decomposing detergent residue have taken hold in parts of the machine that aren't being adequately cleaned between cycles. Left long enough, this contributes to seal degradation, pump wear, and drainage problems that become genuine repair jobs.

The Maintenance That Actually Makes a Difference

Most washing machine maintenance costs nothing and takes under fifteen minutes a month. The machines our engineers find in the worst condition are not the oldest - they're the ones where nothing has been cleaned since the day they were installed. Here's what to focus on.

The rubber door seal

The rubber gasket around the door is where most bad smells originate. After every wash, moisture gets trapped in the folds at the bottom of the seal. Lint, hair, and detergent residue collect there, and the warm, damp environment is ideal for mould. The fix is simple: wipe the inside of the seal with a dry cloth after each cycle, paying particular attention to the bottom section where water pools.

Once a month, pull back the folds and clean inside them with a cloth dampened with white vinegar or a mild antibacterial spray. If black mould is already established - common on machines from Hotpoint and Indesit that have been left unchecked - apply a paste of bicarbonate of soda and water directly to the affected area, leave it for 30 minutes, then scrub clean. If the mould has penetrated the rubber itself, the seal will need replacing.

The detergent drawer

Pull the drawer out completely - most release with a press on a tab inside the drawer. What you find behind it is often a significant source of both smell and mould. Clean the drawer under hot running water with an old toothbrush, paying attention to the compartments and the underside. Use a torch to inspect the housing the drawer sits in and clean inside it too. Leave the drawer slightly open between washes so the housing can dry out properly rather than staying damp.

Using too much detergent accelerates this problem considerably. Liquid detergents in particular leave a sticky residue that mould colonises quickly. Dose according to the packet instructions for your load size - more detergent does not mean cleaner clothes, just more residue left in the machine.

The pump filter

This is the most consistently neglected component in the machines our engineers inspect. The filter protects the pump from debris - coins, hair grips, buttons, and fluff - and should be cleaned every three to six months. On most machines it sits behind a small panel at the front bottom, typically on the right. On Samsung and LG models it's usually accessed via a small square flap.

To clean it properly:

1. Place a towel and a shallow tray under the panel before you open it.
2. If there's a small emergency drain hose, open that first and let the residual water drain into the tray.
3. Unscrew the filter cap slowly, anti-clockwise.
4. Remove any debris from the filter and rinse it under the tap.
5. Check inside the housing for blockages - sometimes a sock or hair grip gets lodged behind where the filter sits.
6. Refit and tighten the cap firmly to prevent leaks.

A blocked filter slows drainage, forces the pump to work harder, and creates stagnant water that contributes directly to bad smells. It's one of the first things our engineers check when a machine comes in smelling bad.

The drum maintenance wash

Run a hot drum clean cycle with no laundry once a month. If your machine has a dedicated drum-clean or service programme, use it. Otherwise, run the hottest cycle available - typically 90 degrees Celsius. Add one of the following (not a combination): 500g of soda crystals, 100ml of white vinegar, 50ml of liquid bleach, or a proprietary cleaner like Dr. Beckmann Service-It or Calgon.

For homes in Surrey where water hardness is above average, this monthly 90-degree wash is particularly important. The heat helps dissolve limescale on the element and flush bacteria from areas a cold or 40-degree wash simply won't reach. If you're running almost all your washes on cold to save energy - which is sensible - you do need that hot maintenance cycle to compensate.

Warning Signs a Washing Machine Is Reaching End of Life

Recognising when a machine is in terminal decline saves you spending money on repairs that only delay the inevitable. These are the signs our engineers see most often when a machine is approaching the end of its serviceable life.

• Drum bearing noise. A rumbling or grinding sound during the spin cycle that grows progressively louder is almost always drum bearings failing. On some older Hotpoint and Indesit machines, the bearings are integral to the drum assembly, which can make the repair prohibitively expensive relative to the machine's value.
• Persistent leaks. A hose or door seal that leaks once can typically be repaired. Leaks that return quickly after repair, or multiple leak points developing at once, suggest the drum or outer tub is compromised.
• Clothes still wet after a full cycle. If the machine completes its programme but clothes are coming out very wet, the motor brushes may be worn. This is common in machines over eight years old and is a sign the motor is starting to fail.
• Burning smell during spin. A musty smell is a maintenance issue. A burning smell - particularly during spin - points to motor or wiring problems and needs professional assessment before the machine is used again.
• Control panel faults and incomplete cycles. Intermittent error codes, programmes that stop mid-cycle, or buttons that stop responding can indicate sensor or control board failure. Control boards on newer machines typically cost between 100 and 200 pounds to replace - at which point the machine's age becomes a critical factor in whether repair makes sense.

Repair vs Replace - the Honest Calculation

The rule of thumb our engineers use is this: if the repair costs more than half the price of an equivalent new machine, replacement is usually the better decision. But the machine's age matters more than any single repair cost in isolation.

A machine under five years old with a faulty pump or a torn door seal is almost always worth repairing. A machine that's ten or eleven years old with failing drum bearings is a different calculation - the repair might cost 150 to 300 pounds, and the machine may only have three or four years of use left even if the repair holds.

Typical repair costs from a qualified appliance engineer in the current market:

• Door seal replacement: 80 to 130 pounds
• Pump replacement: 90 to 150 pounds
• Drum bearing replacement: 150 to 300 pounds (higher on some models)
• Control board replacement: 100 to 250 pounds
• Motor replacement: 120 to 220 pounds

New mid-range machines from Bosch, Samsung, or LG currently sit between 400 and 700 pounds. Budget options from Beko or Hotpoint start around 280 to 350 pounds. Factor in that a new A-rated machine uses meaningfully less electricity than a ten-year-old D or E-rated model - for a household doing daily washes, the energy saving over five years can be significant.

For Addlestone households trying to decide whether a fault is worth fixing, the Voltrade GoFIX diagnostic tool can help identify whether a problem is minor or symptomatic of something deeper before committing to either a repair callout or a new machine.

Annual Service - What It Should Include

Manufacturers don't typically mandate annual servicing for domestic washing machines, but the evidence from our engineers is clear: machines that receive periodic professional checks consistently outlast those that don't. A proper service is not just a clean - it's an assessment of the components most likely to fail.

What a thorough annual service should cover:

1. Full visual inspection of the drum, door seal, inlet hoses, and drain hose for cracking, wear, or early signs of failure.
2. Pump filter clean and pump assessment - confirming the pump runs freely and the impeller isn't obstructed or damaged.
3. Detergent drawer and housing clean - removing mould and checking the water inlet valve for scale build-up or partial blockage.
4. Drum bearing check - listening and feeling for early bearing wear during a test spin cycle.
5. Door seal inspection - checking for splits, perished rubber, mould penetration, and whether the seal is making proper contact when the door closes.
6. Motor brush assessment (on machines with brushed motors) - worn brushes are a common and frequently missed cause of spin failure.
7. Limescale evaluation - particularly relevant in Surrey where water hardness means scale builds up faster on heating elements and drum walls.
8. Drain hose position check - confirming the hose is positioned correctly and not creating a siphoning effect that draws water back into the drum.

A service from a qualified appliance engineer typically costs between 60 and 120 pounds, depending on location and whether any minor parts are replaced during the visit. That's considerably less than an emergency callout when something fails at an inconvenient moment - which, in our experience, is usually when you have a full drum of wet laundry.

Simple Habits That Extend the Life by Years

The machines that last are those whose owners do a small number of things consistently. None of this takes significant time or effort.

• Leave the door open after every wash. This is the single most effective thing you can do to prevent mould and smell. It allows the drum and seal to dry between cycles. Even leaving it ajar an inch makes a difference.
• Don't leave wet washing sitting in the drum. Clothes left in a closed drum create exactly the warm, damp conditions mould needs. Get them out promptly after the cycle ends.
• Dose detergent correctly. Excess detergent - particularly liquid detergent - leaves residue in the seal, drum, and drain hose that builds up over time and feeds odour-causing bacteria.
• Vary your wash temperatures. Running everything on cold is fine for most loads, but it means grease, bacteria, and detergent residue are never fully flushed. Mix in occasional 60-degree washes and do the monthly 90-degree maintenance cycle.
• Don't overload. Consistently overfilling the drum puts extra strain on the bearings and motor. A full drum should still leave room for your hand to rotate through the top of the load.
• Keep the machine level. An unlevel machine vibrates significantly more during spin, which accelerates bearing wear. Check the feet if the machine is noisy or moves during a cycle - levelling feet adjust with a spanner and can make a real difference to noise and vibration.
• Use a water softener in hard water areas. In Addlestone and other parts of Surrey where water hardness is elevated, adding a water softener tablet to the drum wash compartment regularly - or running the machine on Calgon periodically - slows limescale accumulation on the heating element and drum walls.

Many of the machines we visit in Addlestone that are struggling prematurely are being used in ways that are quite fixable. A conversation with the homeowner about detergent dosing and door ventilation alone has extended the working life of machines that were about to be written off.

Washing Machine Maintenance Questions

Why does my washing machine still smell after I have cleaned it?

If the smell returns quickly after a cleaning cycle, the most likely cause is the pump filter or a partial blockage in the drain hose that wasn't fully cleared. In Surrey's hard water areas, limescale can trap bacteria and odour-causing residue on the heating element and drum walls where a standard hot wash won't fully penetrate. Check the pump filter, run a second 90-degree cycle with soda crystals, and confirm the drain hose isn't kinked or positioned so low that water siphons back into the drum between cycles.

How often should I run a cleaning cycle on my washing machine?

Once a month is the standard recommendation for most households doing four to six cycles a week. If you're running the machine daily, or washing a lot of sportswear and towels, fortnightly is better. For homes in Addlestone and the surrounding areas of Surrey where water hardness is above average, a monthly 90-degree wash with soda crystals or a dedicated limescale treatment is particularly important - scale accumulates faster here than in softer-water parts of the country, and it traps the residue that causes bad smells.

Can I use vinegar and bicarbonate of soda together to clean the drum?

You can use both, but not simultaneously. When combined they react and neutralise each other, so you get the cleaning benefit of neither. Use them separately instead - run one cycle with white vinegar, then a separate cycle with bicarbonate of soda, or alternate them month by month. Either works on its own for mild odours. For more established smells or heavy limescale deposits, a proprietary drum cleaner like Dr. Beckmann Service-It tends to be more effective than either home remedy used alone.

Is a smelly washing machine always a sign of a mechanical problem?

No - in most cases a bad smell is a maintenance issue rather than a fault, and you can resolve it yourself with a thorough clean of the filter, seal, drawer, and drum. However, if the smell is burning rather than musty or damp, that points to an electrical or motor problem and you should stop using the machine and get it checked professionally. If a genuine musty smell persists despite thorough cleaning, an engineer should assess whether there's a drainage issue, a damaged seal allowing water to pool somewhere hidden, or a pump problem affecting how completely the machine empties after each cycle.